code: def test_pickleable(env_ids):
      """Test Bullet environments are pickle-able"""
      for env_id in env_ids:
          # extract id string
          env_id = env_id.replace("- ", "")
          env = BulletEnv(env_id)
          round_trip = pickle.loads(pickle.dumps(env))
          assert round_trip
          env.close()
  
file_path: garage/tests/garage/envs/bullet/test_bullet_env.py
imports: import pickle
  import pybullet_envs
  from pybullet_utils.bullet_client import BulletClient
  import pytest
  from garage.envs.bullet import BulletEnv
  from tests.helpers import step_env
label_desc: Use image node_id 2 for calling a global function with example usage: test_pickleable(env_ids) without return types